CN207706181U - A kind of filter group device of ultrashort wave broadband transceiver - Google Patents
A kind of filter group device of ultrashort wave broadband transceiver Download PDFInfo
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- CN207706181U CN207706181U CN201721903446.0U CN201721903446U CN207706181U CN 207706181 U CN207706181 U CN 207706181U CN 201721903446 U CN201721903446 U CN 201721903446U CN 207706181 U CN207706181 U CN 207706181U
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- ultrashort wave
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- duplexer
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Abstract
The utility model belongs to ultra short wave communication equipment technical field, disclose a kind of docking for broad-band channel receiver and transmitter radio frequency receiving front-end transmitting end collect mail number and transmitting signal carry out frequency-selecting, the ultrashort wave broadband transceiver being filtered filter group device, the device of the support broad-band channel and duplex channel includes：The 1st electronic switch, the 2nd electronic switch, the 3rd electronic switch, the 4th electronic switch switched for realizing transceiver pattern and reiving/transmitting state；For realizing the duplexer to work under satellite communication dual-mode；A filter amplifier group for the channel docking collection of letters number filtering and amplification is received for realizing ultrashort wave broad-band channel pattern；For realizing ultrashort wave broad-band channel Mode Launch channel to the subrane harmonic filter of transmitting signal filtering.
Description
Technical field
The utility model belongs to ultra short wave communication equipment technical field more particularly to a kind of ultrashort wave broadband transceiver
Filter group device emits the docking collection of letters number of end for broad-band channel transceiver receiving front-end and transmitting signal is selected
Frequently the filter group device, being filtered.
Background technology
With the continuous development of Ultra-short Wave Communication Technique and communication technology of satellite, it can realize wide-band ultra short wave communication and defend
The communication equipment with broad-band channel, duplex channel of star communication comes into being.Due to the continuous deterioration of external electromagnetic environment, frequency
Rate resource finiteness needs to preferably receive the useful signal of user's concern in such receiver and transmitter radio frequency receiving front-end
The collection of letters number is docked to carry out frequency-selecting, be filtered；In order to reduce influence of the unnecessary electromagnetic radiation to other communication equipments, need
To emit signal to receiver and transmitter radio frequency to carry out filtering out harmonic wave and spuious processing.There is such application demand, in the design
With regard to needing a kind of VHF/UHF frequency ranges broadband filter group device.It is more conventional to the application of filter in previous design, it has no such
Constitute complicated filter group.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of filter groups of ultrashort wave broadband transceiver
Device realizes broadband, duplex channel transceiver to wideband received signal and emits the frequency-selecting of signal, filters；It receives, transmitting
Matching between channel and antenna improves reception and emission effciency；The foundation of duplex channel when satellite duplex communication；Not
With the channel switching under pattern.
In order to achieve the above objectives, the utility model adopts the following technical solution is achieved.
A kind of filter group device of ultrashort wave broadband transceiver, described device are arranged in ultrashort wave broadband transceiver
Inside, for connecting ultrashort wave broadband transceiver and radio-frequency antenna；It is provided with transmitting in the ultrashort wave broadband transceiver
Channel mouth receives channel mouth, and radio-frequency antenna mouth is provided on the radio-frequency antenna；
Described device includes：First electronic switch, the second electronic switch, third electronic switch, the 4th electronic switch, partial wave
Section harmonic filter, filter amplifier group, duplexer and control first electronic switch, the second electronic switch, third electricity
The controller of the on off state of sub switch and the 4th electronic switch；
First electronic switch and second electronic switch are respectively multy-way switching electronic switch, the third electronics
Switch and the 4th electronic switch are respectively two-way switching electronic switch；
First electronic switch, for by the radio-frequency antenna mouth respectively with the subrane harmonic filter, described
Duplexer is connected with the filter amplifier group；
Second electronic switch, for the 4th electronic switch to be connect with the subrane filter；
The third electronic switch, for by the duplexer and the filter amplifier group respectively with the reception channel
Mouth connection；
4th electronic switch, for by the launch channel mouth respectively with second electronic switch, the duplex
Device connects.
It the characteristics of technical solutions of the utility model and is further improved to：
(1) the ultrashort wave broadband transceiver includes two kinds of operating modes：Ultrashort wave broad-band channel pattern, satellite communication
Dual-mode；
When the ultrashort wave broadband transceiver be ultrashort wave broad-band channel pattern reception state when, radio frequency receiving signal according to
It is secondary to pass through radio-frequency antenna mouth, the first electronic switch, filter amplifier group, third electronic switch and reception channel mouth；
When the ultrashort wave broadband transceiver be ultrashort wave broad-band channel Mode Launch state when, radio frequency transmissions according to
It is secondary by launch channel mouth, the 4th electronic switch, the second electronic switch, subrane harmonic filter, the first electronic switch and to penetrate
Frequency antenna opening；
When the ultrashort wave broadband transceiver is satellite communication dual-mode, radio frequency receiving signal passes sequentially through radio frequency
Antenna opening, duplexer, third electronic switch, receives channel mouth at the first electronic switch；Radio frequency transmissions pass sequentially through transmitting letter
Road junction, the 4th electronic switch, duplexer, the first electronic switch and radio-frequency antenna mouth.
(2) there are three radio frequency mouths for setting on the duplexer, are respectively combined mouth, emission port and receiving port；The duplex
Device is enabled in the case where ultrashort wave broadband transceiver is satellite communication dual-mode；
The duplexer includes：First adaptation, combiner, the second adaptation, combining mouth, connects emission bandpass filter
Take-up bandpass filter, the first low-noise amplifier, sound watchband bandpass filter；
In the duplexer, radio frequency transmissions pass sequentially through emission port, the first adaptation, emission bandpass filter,
Combiner, the second adaptation and combining mouth；
In the duplexer, radio frequency receiving signal passes sequentially through combining mouth, the second adaptation, combiner, receives band logical
Filter, the first low-noise amplifier, sound watchband bandpass filter and receiving port.
(3) the filter amplifier group is when ultrashort wave broadband transceiver is ultrashort wave broad-band channel pattern reception state
It enables；
The filter amplifier group includes：The reception broadband filter that unidirectionally connects successively, the second low-noise amplifier and
It receives broadband filter described in electrically tunable filter to connect with the first electronic switch, the electrically tunable filter is correlated with third electronic cutting
It connects.
(4) controller is according to two kinds of operating modes of ultrashort wave broadband receiver and the receipts of each operating mode
Hair-like state, output make the first electronic switch, the second electronic switch, third electronic switch and the 4th electronic switch switch over
Control signal.
The beneficial effects of the utility model are：Small electronic switch, VHF/UHF frequency ranges broadband letter are encapsulated using multiple QFN
Road, duplex channel transceiver can quickly, flexibly realize operating mode and transmitting-receiving control switching.The Integration Design of duplexer
And matched design, make its integrated level higher, index is more excellent, ensure that connecing under such transceiver Satellite communication dual-mode
Front end and transmitting end index are received, satellite communication effect is improved.The design of filter amplifier group makes its integrated level higher, protects
The indexs such as frequency selectivity and the noise coefficient of such transceiver middle width strip reception have been demonstrate,proved, ultrashort wave broad-band channel has been improved and connects
It produces effects fruit.Subrane harmonic filter covers ultrashort wave wideband channel frequency by rational segment design, ensure that ultrashort wave
Broad-band channel launching effect.The utility model patent is designed with conducive to the broadband, duplexing of transceiver, Miniaturization Design.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structure of the filter group device for ultrashort wave broadband transceiver that the utility model embodiment provides
Schematic diagram；
Fig. 2 is the structural schematic diagram for the duplexer that the utility model embodiment provides
Fig. 3 is the filter amplifier group structural schematic diagram that the utility model embodiment provides；
Fig. 4 is the subrane harmonic filter structural schematic diagram that the utility model embodiment provides；
Fig. 5 is the controller connection diagram that the utility model embodiment provides.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The utility model embodiment provides a kind of filter group device (VHF/UHF frequency ranges of ultrashort wave broadband transceiver
Broadband reception emission filter group device) include：
Emit the subrane harmonic filter of frequency range for covering ultra short wave communication, receive frequency for covering ultra short wave communication
Section filter amplifier group (including reception broadband filter, low-noise amplifier, electrically tunable filter) is received for satellite communication
Send out frequency range duplexer (including LC type emission bandpass filter, two transmitting adaptations, dielectric resonator type receive bandpass filtering
Device, low noise amplification filter), the 1st electronic switch, the 2nd electronic switch, the 3rd electronic switch, the 4th electronic switch.1st electronics
Switch connects radio-frequency antenna mouth respectively at subrane harmonic filter, filter amplifier group, duplexer, and the 2nd electronic switch will
Subrane harmonic filter and the connection of the 4th electronic switch, the 3rd electronic switch will receive channel respectively at duplexer, filter and amplification
Device group connects, and the 4th electronic switch connects launch channel respectively at duplexer, the 2nd electronic switch.
Further,
A kind of VHF/UHF frequency ranges broadband reception emission filter group device, including 3 prevention at radio-frequency port (receive channel
Port, launch channel port, radio-frequency antenna mouth), reception channel, launch channel, the radio-frequency antenna mouth of transceiver are separately connected
Utility model device corresponding position.Include 4 electronic switches inside utility model device, according to the two of transceiver kinds of moulds
Formula (ultrashort wave broad-band channel pattern, satellite communication dual-mode) draws the radio frequency reception channel inside utility model device
It is divided into two-way, the radio frequency transmitting channel inside utility model device is also divided into two-way.In addition in ultrashort wave broad-band channel
Under pattern, the subrane harmonic filter of the 1st electronic switch and the 2nd electronic switch switching connection different frequency range.The utility model
Device is built in inside transceiver, and transmitting-receiving control, different mode switching control are carried out by transceiver controller.
A kind of VHF/UHF frequency ranges broadband reception emission filter group device, including a kind of duplexer.In the duplexer
Portion also includes reception and transmission channel, and wherein transmission channel is followed successively by the 1st adaptation by signal trend, LC type emission bandpass filters
Device, combiner, the 2nd adaptation；Receiving channel is followed successively by the 2nd adaptation, combiner, dielectric resonator type by signal trend and receives
Bandpass filter, low-noise amplifier, sound watchband bandpass filter.The duplexer enables under satellite communication dual-mode, transmitting-receiving
Letter machine controller carries out control switching manipulation and electronic switch is switched under the pattern, and transmitting-receiving control is in diplex operation state.
A kind of VHF/UHF frequency ranges broadband reception emission filter group device, including a kind of filter amplifier group.The filter
Twt amplifier group includes that circuit is followed successively by reception broadband filter, low-noise amplifier, electrically tunable filter by signal trend.The filter
Wave device amplifier group opens under ultrashort wave broad-band channel pattern when transceiver controller transmitting-receiving control is in reception working condition
With.
A kind of VHF/UHF frequency ranges broadband reception emission filter group device, including subrane harmonic filter.This point
Wave band harmonic filter frequency coverage transceiver VHF/UHF working frequency range, under ultrashort wave broad-band channel pattern, transmitting-receiving letter
It is enabled when machine controller transmitting-receiving control is in transmitting working condition.Transceiver controller carries out control the 1st electronic switch and the 2nd
Electronic switch switches over subrane harmonic filter.
Specifically,
Referring to Fig.1, the structure for a kind of VHF/UHF frequency ranges broadband reception emission filter group device of the utility model is shown
It is intended to.The device includes 3 radio frequency mouths, respectively radio-frequency antenna mouth, launch channel mouth, reception channel mouth.Connect inside the device
It is connected in：Radio-frequency antenna mouth connects the 1st electronic switch, and the 1st electronic switch is separately connected subrane harmonic filter, duplexer, filter
Twt amplifier group；Subrane harmonic filter is between the 1st electronic switch and the 2nd electronic switch；Duplexer is in the 1st electronics
Between switch and the 4th electronic switch；Filter amplifier group is between the 1st electronic switch and the 3rd electronic switch；Launch channel mouth
The 4th electronic switch is connected, the 4th electronic switch is separately connected the emission port of the 2nd electronic switch, duplexer；Receive the connection of channel mouth
3rd electronic switch, the 3rd electronic switch are separately connected the receiving port of duplexer, filter amplifier group.According to the two of transceiver
Kind pattern and reiving/transmitting state, controller send out control 4 electronic switches of signal pair and switch over operation.
When transceiver is in ultrashort wave broad-band channel pattern reception state, reception signal moves towards sequence and is：Radio frequency day
Line mouth, filter amplifier group, the 3rd electronic switch, receives channel mouth at the 1st electronic switch.When transceiver is in ultrashort wave broadband
When channelling mode emission state, transmitting signal moves towards sequence and is：Launch channel mouth, the 4th electronic switch, the 2nd electronic switch, partial wave
Section harmonic filter, the 1st electronic switch, radio-frequency antenna mouth.When transceiver is in satellite communication dual-mode, transmitting-receiving is simultaneously
Work, reception signal move towards sequence and are：Radio-frequency antenna mouth, duplexer, the 3rd electronic switch, receives channel mouth at the 1st electronic switch；
Transmitting signal moves towards sequence：Launch channel mouth, the 4th electronic switch, duplexer, the 1st electronic switch, radio-frequency antenna mouth.
The utility model implement in, the 1st electronic switch to the 4th electronic switch may be used thyristor, switching diode, after
Electric appliance, IC electronic switches etc., in order to which the requirement for reaching transceiver miniaturization and being switched fast recommends the IC electricity of QFN encapsulation
Sub switch.1st electronic switch and the 2nd electronic switch are multy-way switching, therefore select multy-way switching electronic switch；3rd electronic switch
Switch electronic switch with the optional then two-way of the 4th electronic switch.The control signal of electronic switch should carry out EMI and be filtered, and prevent
Mistake switching occurs for electromagnetic interference.
It is a kind of duplexer of VHF/UHF frequency ranges broadband reception emission filter group device of the utility model with reference to Fig. 2
Structural schematic diagram.The duplexer includes 3 radio frequency mouths, is respectively combined mouth, emission port, receiving port.The duplexer is logical in satellite
Letter dual-mode under enable, transmission channel by signal trend be followed successively by emission port, the 1st adaptation, LC type emission bandpass filter,
Combiner, the 2nd adaptation, combining mouth；Receiving channel is followed successively by combining mouth, the 2nd adaptation, combiner, medium by signal trend
Resonator type reception bandpass filter, low-noise amplifier, sound watchband bandpass filter, receiving port.Wherein the 2nd adaptation is transmitting-receiving
It shares.Combiner is used for the combining of two bandpass filters, realizes that two-way filter is mutually unaffected.LC type emission bandpass is filtered
The effect of wave device is to filter out the harmonic wave and other band strays of transmitting signal, it is often more important that prevents noise floor variation when transmitting
The influence of the docking collection of letters number.Dielectric resonator type reception bandpass filter is used for selecting satellite band signal, and filters out transmitting
The transmission power signal of frequency range prevents receiving terminal channel to be saturated.Low-noise amplifier harmony watchband bandpass filter is according to channel need
The gain and selectivity wanted carry out the selection of model and quantity.Further need exist in view of low-noise amplifier current drain and
1dB compression points ensure the power consumption and the linearity of transceiver.
During the utility model is implemented, the 1st adaptation and the T-type network that the 2nd adaptation is LC realizations, the 1st adaptation are used for
Emission port is matched, emission effciency is improved, reduces reflection loss.2nd adaptation is transmit-receive sharing, for matching the day of transceiver
Line improves reception and emission effciency.Combiner is also LC type networks.
With reference to Fig. 3, the filtering for a kind of VHF/UHF frequency ranges broadband reception emission filter group device of the utility model is put
Big device group structural schematic diagram.The filter amplifier group is when transceiver is in ultrashort wave broad-band channel pattern reception state, control
Device processed controls the gating of the 1st electronic switch and the 3rd electronic switch, and reception signal flows to successively is：1st electronic switch receives width
Band filter, low-noise amplifier, electrically tunable filter, the 3rd electronic switch.It is LC molded breadth band band logicals wherein to receive broadband filter
Filter, design Insertion Loss is small, plays the role of matching and filtering out out-of-band interference.The selection of low-noise amplifier is also to consider channel
The indexs such as gain, noise coefficient, electric current, the linearity.Controller is sent out electrically tunable filter according to the frequency of transceiver and is tuned
Voltage, the change of tuning voltage value can change the capacitance of the varactor of resonant tank to change resonance point, to realize
Frequency-selecting to transceiver current setting frequency signal.The selectivity of electrically tunable filter is preferable, contributes for channel selectivity.
It is a kind of subrane of VHF/UHF frequency ranges broadband reception emission filter group device of the utility model with reference to Fig. 4
Harmonic filter structural schematic diagram.The subrane harmonic filter is in ultrashort wave broad-band channel Mode Launch shape in transceiver
It works when state.Controller is according to the 1st electronic switch of frequency electing and passing of transceiver and the 2nd electronic switch, to the hair of different frequency range
Signal is penetrated to be filtered.It is No. 3 low-pass filter compositions to illustrate subrane harmonic filter：1st low-pass filter, the 2nd low pass
Filter, the 3rd low-pass filter.Certainly according to the broad-band channel width of transceiver, frequency range can be divided into other numbers,
And choose the suitable electronic switch of number of channels.3 sections of low-pass filters that the utility model low-pass filter group includes are equal
For Elliptic Function Type LC low-pass filters.
It is a kind of controller of VHF/UHF frequency ranges broadband reception emission filter group device of the utility model with reference to Fig. 5
Connection diagram.For transceiver controller according to the both of which and reiving/transmitting state of transceiver, exporting makes the 1st electronic switch arrive
The control signal that 4th electronic switch switches over, output make the control signal of electrically tunable filter work and tuning voltage, output make
The control signal that transmitting-receiving power supply works to utility model device.
The beneficial effects of the utility model are：Small electronic switch, VHF/UHF frequency ranges broadband letter are encapsulated using multiple QFN
Road, duplex channel transceiver can quickly, flexibly realize operating mode and transmitting-receiving control switching.The Integration Design of duplexer
And matched design, make its integrated level higher, index is more excellent, ensure that connecing under such transceiver Satellite communication dual-mode
Front end and transmitting end index are received, satellite communication effect is improved.The design of filter amplifier group makes its integrated level higher, protects
The indexs such as frequency selectivity and the noise coefficient of such transceiver middle width strip reception have been demonstrate,proved, ultrashort wave broad-band channel has been improved and connects
It produces effects fruit.Subrane harmonic filter covers ultrashort wave wideband channel frequency by rational segment design, ensure that ultrashort wave
Broad-band channel launching effect.The utility model patent is designed with conducive to the broadband, duplexing of transceiver, Miniaturization Design.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in computer read/write memory medium, which exists
When execution, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes：ROM, RAM, magnetic disc or CD
Etc. the various media that can store program code.
Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power
Subject to the protection domain that profit requires.
Claims (5)
1. a kind of filter group device of ultrashort wave broadband transceiver, which is characterized in that described device setting is wide in ultrashort wave
Inside band transceiver, for connecting ultrashort wave broadband transceiver and radio-frequency antenna；In the ultrashort wave broadband transceiver
It is provided with launch channel mouth, receives channel mouth, radio-frequency antenna mouth is provided on the radio-frequency antenna；
Described device includes：First electronic switch, the second electronic switch, third electronic switch, the 4th electronic switch, subrane are humorous
Wave filter, filter amplifier group, duplexer and control first electronic switch, the second electronic switch, third electronic cutting
Close the controller with the on off state of the 4th electronic switch；
First electronic switch and second electronic switch are respectively multy-way switching electronic switch, the third electronic switch
It is respectively that two-way switches electronic switch with the 4th electronic switch；
First electronic switch, for by the radio-frequency antenna mouth respectively with the subrane harmonic filter, the duplex
Device is connected with the filter amplifier group；
Second electronic switch, for the 4th electronic switch to be connect with the subrane filter；
The third electronic switch, for connecting the duplexer and the filter amplifier group with the reception channel mouth respectively
It connects；
4th electronic switch, for connecting the launch channel mouth with second electronic switch, the duplexer respectively
It connects.
2. a kind of filter group device of ultrashort wave broadband transceiver according to claim 1, which is characterized in that described
Ultrashort wave broadband transceiver includes two kinds of operating modes：Ultrashort wave broad-band channel pattern, satellite communication dual-mode；
When the ultrashort wave broadband transceiver is ultrashort wave broad-band channel pattern reception state, radio frequency receiving signal leads to successively
It crosses radio-frequency antenna mouth, the first electronic switch, filter amplifier group, third electronic switch and receives channel mouth；
When the ultrashort wave broadband transceiver is ultrashort wave broad-band channel Mode Launch state, radio frequency transmissions lead to successively
Cross launch channel mouth, the 4th electronic switch, the second electronic switch, subrane harmonic filter, the first electronic switch and radio frequency day
Line mouth；
When the ultrashort wave broadband transceiver is satellite communication dual-mode, radio frequency receiving signal passes sequentially through radio-frequency antenna
Mouth, receives channel mouth at the first electronic switch, duplexer, third electronic switch；Radio frequency transmissions pass sequentially through launch channel
Mouth, the 4th electronic switch, duplexer, the first electronic switch and radio-frequency antenna mouth.
3. a kind of filter group device of ultrashort wave broadband transceiver according to claim 1, which is characterized in that described
There are three radio frequency mouths for setting on duplexer, are respectively combined mouth, emission port and receiving port；The duplexer is received in ultrashort wave broadband
Sender is to be enabled under satellite communication dual-mode；
The duplexer includes：First adaptation, combiner, the second adaptation, combining mouth, receives band at emission bandpass filter
Bandpass filter, the first low-noise amplifier, sound watchband bandpass filter；
In the duplexer, radio frequency transmissions pass sequentially through emission port, the first adaptation, emission bandpass filter, combining
Device, the second adaptation and combining mouth；
In the duplexer, radio frequency receiving signal passes sequentially through combining mouth, the second adaptation, combiner, receives bandpass filtering
Device, the first low-noise amplifier, sound watchband bandpass filter and receiving port.
4. a kind of filter group device of ultrashort wave broadband transceiver according to claim 1, which is characterized in that described
Filter amplifier group is enabled when ultrashort wave broadband transceiver is ultrashort wave broad-band channel pattern reception state；
The filter amplifier group includes：Reception broadband filter, the second low-noise amplifier and the electricity unidirectionally connected successively is adjusted
It receives broadband filter described in filter to connect with the first electronic switch, the electrically tunable filter is connect with third electronic switch.
5. a kind of filter group device of ultrashort wave broadband transceiver according to claim 1, which is characterized in that described
For controller according to two kinds of operating modes of ultrashort wave broadband receiver and the reiving/transmitting state of each operating mode, output makes the
The control signal that one electronic switch, the second electronic switch, third electronic switch and the 4th electronic switch switch over.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721903446.0U CN207706181U (en) | 2017-12-29 | 2017-12-29 | A kind of filter group device of ultrashort wave broadband transceiver |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721903446.0U CN207706181U (en) | 2017-12-29 | 2017-12-29 | A kind of filter group device of ultrashort wave broadband transceiver |
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| CN207706181U true CN207706181U (en) | 2018-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979388A (en) * | 2017-12-29 | 2018-05-01 | 陕西烽火电子股份有限公司 | A kind of wave filter group device of ultrashort wave broadband transceiver |
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2017
- 2017-12-29 CN CN201721903446.0U patent/CN207706181U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979388A (en) * | 2017-12-29 | 2018-05-01 | 陕西烽火电子股份有限公司 | A kind of wave filter group device of ultrashort wave broadband transceiver |
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